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Thread: Unlocking e40 ECM

  1. #1
    Junior Member
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    May 2008
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    Default Unlocking e40 ECM

    I have a e40 ecm that was tuned by someone else and they locked the tune. I reflashed the ecm with stock calibration using the oem scan tool (mdi). i'm helping someone out, he is tuning with hp tuners and still can't access tune. has any tried using the efilive unlocking ecm feature? will I have to use a credit? if I get it unlocked and it puts ecm in a Deadpool can i reflash it with gm tool or will i need a tune in efilive format? I will try using the unlocking feature tomorrow, just trying to get heads up on anything.

  2. #2
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    i unlocked ecm with no problem it took about 10min

  3. #3
    Forum tyhee Site Admin GMPX's Avatar
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    "I reflashed the ecm with stock calibration using the oem scan tool (mdi)."
    Then it wasn't locked, if the ECM is locked then TIS can't flash the ECM either. HPT is very fussy about VIN's etc as well so maybe it was a simple as getting all that correct?
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  4. #4
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    I flashed ecm with two different vins, 05 gto and 06 trailblazer with mdi. both calibrations took, I could see different calibrations both times I flashed it. but ecm calibration still could not be read using efilive or hpt. after tring to read tune with efi a message came up in red letters stating that controller is locked with sercurity code. I clicked try alt keys to unlock ecm it took about 10min then a message in green letters popped up stating ecm is now unlocked. now both hpt/efilive could both read the tune and edit. with tis I normally can reflash back to stock and all is well. I have been doing it for years. hpt is doing something different now

  5. #5
    Forum tyhee Site Admin GMPX's Avatar
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    Very odd indeed, I can't explain how that all worked.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


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